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ADM8828 - Switched-Capacitor Voltage Inverter

Description

The ADM8828/ADM8829 is a charge-pump voltage inverter which may be used to generate a negative supply from a positive input.

1.5 V to

5.5 V output supply.

Features

  • Inverts Input Supply Voltage 99% Voltage Conversion Efficiency 25 mA Output Current Shutdown Function Requires Only Two Capacitors 1 ␮F Capacitors 18 ⍀ Output Resistance +1.5 V to +5.5 V Input Range 600 ␮A Quiescent Current 20 nA Shutdown Current (ADM8828).

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Full PDF Text Transcription

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a FEATURES Inverts Input Supply Voltage 99% Voltage Conversion Efficiency 25 mA Output Current Shutdown Function Requires Only Two Capacitors 1 ␮F Capacitors 18 ⍀ Output Resistance +1.5 V to +5.5 V Input Range 600 ␮A Quiescent Current 20 nA Shutdown Current (ADM8828) APPLICATIONS Handheld Instruments LCD Panels Cellular Phones PDAs Remote Data Acquisition Op Amp Power Supplies Switched-Capacitor Voltage Inverter with Shutdown ADM8828/ADM8829 FUNCTIONAL BLOCK DIAGRAMS OUT 1 6 CAP+ ADM8828 IN 2 TOP VIEW 5 SHDN CAP– 3 (Not to Scale) 4 GND OUT 1 6 CAP+ ADM8829 IN 2 TOP VIEW 5 NC CAP– 3 (Not to Scale) 4 GND NC = NO CONNECT GENERAL DESCRIPTION The ADM8828/ADM8829 is a charge-pump voltage inverter which may be used to generate a negative supply from a positive input.
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